Integral lifting and installation method for pump protection pipe of deepwater offshore platform

Abstract

The invention provides an integral lifting and installing method for a deeper water ocean platform pump protection pipe. The method comprises the step 1 that the whole pump protection pipe is previously arranged on a pipe frame, and then the whole pump protection pipe is temporarily fixed, the step 2 that an upper assembly is arranged on the pipe frame, and the temperature fixation to the whole pump protection pipe is removed, and the step 3 that the whole pump protection pipe is lifted to the designed elevation, and then the whole pump protection pipe is fixed to a deck of the upper assembly. The whole pump protection pipe is previously arranged on the pipe frame, and then the pump protection pipe is lifted to the designed elevation of the assembly to be fixed, so that margin cutting and butt joint to connecting sections of the pump protection pipe can be avoided, and the welding work amount is reduced. Furthermore, the work amount for constructing and disassembling a temporary construction platform is avoided, the marine work amount is greatly reduced, the marine construction period is shortened, and the construction cost is reduced.

Description

technical field [0001] The invention relates to an installation method of a pump protection pipe, in particular to an overall lifting installation method suitable for a pump protection pipe of a deep-water ocean platform. It belongs to the field of offshore oil engineering. Background technique [0002] Offshore platforms are the infrastructure for offshore oil and gas development, as well as the base for offshore production operations and living. There are various forms of offshore platforms. Among them, the jacket-type fixed platform is currently the most used platform form in China. It consists of two parts: the upper block structure and the lower jacket foundation structure. The installation of the jacket platform is generally carried out in two steps. First, the jacket structure is installed, and then the upper block structure is installed on the jacket. And this type of platform needs to set the design interface of the upper block and the jacket, for example: the sea...

AI Technical Summary

Problems solved by technology

Since the connection section of the pump protection pipe generally considers a certain length of allowance, when installing the connection section, it is necessary to cut off the allowance of the connection section, which increases the workload of cutting, butt joint and welding; and, when welding the connection section, due to the height The reason is that sometimes it is necessary to build a temporary construction platform and dismantle the construction platform after the welding is completed, which not only increases the workload at sea; at the same time, due to the influence of the unevenness of the submarine installation of the jacket, the size of the pump protection pipe interface needs to be considered when the connection section is aligned shape error

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